/*
 * Copyright (c) 2019 - now, Eggroll Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.webank.eggroll.core.retry.impl.predicate;

import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.webank.eggroll.core.retry.AttemptContext;
import javax.annotation.Nullable;

public final class ExceptionClassPredicate<T> implements Predicate<AttemptContext<T>> {

  private Class<? extends Throwable> exceptionClass;

  public ExceptionClassPredicate(Class<? extends Throwable> exceptionClass) {
    Preconditions.checkNotNull(exceptionClass, "exception class cannot be null");
    this.exceptionClass = exceptionClass;
  }

  @Override
  public boolean apply(@Nullable AttemptContext<T> attemptContext) {
    if (!attemptContext.hasException()) {
      return false;
    }
    return exceptionClass.isAssignableFrom(attemptContext.getExceptionCause().getClass());
  }
}
